Russian studies is an interdisciplinary field crossing history and language studies. It is closely related to Soviet and Communist studies and many times is included under Slavic studies.
Poor air quality is a major health risk, causing lung diseases, cardiovascular diseases, and cancer. Air pollution also impacts the environment, affecting the quality of fresh water, soil, and ecosystems.
EN 
CS
DE
ES
FR
HU
IT
PL
PT
РУ
SK
TR
УК
AR
中文
